Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

Annotations already declare readOnlyHint=true, openWorldHint=false, and destructiveHint=false, so the safety profile is covered. The description adds real behavioral value by enumerating what comes back (ids, names, emails, roles, teams with team ids, availability), which matters given there is no output schema. It says nothing about pagination defaults or rate limits, so not a 5.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

Two sentences, both load-bearing: the first states the resource and return shape, the second routes the returned ids to their consumers. No filler or restatement of the title.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a zero-required-param list tool with read-only annotations, the description is nearly complete: it covers return fields (compensating for no output schema), pagination is handled by the schema, and id semantics are explained. Only minor omissions, such as default page size behavior, remain.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema description coverage is 100% and both parameters (page, perPage) are already fully documented with bounds and the metadata.hasMore follow-up signal. The description adds nothing about parameter behavior, so the baseline 3 is appropriate.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

Specific verb (List) plus resource (workspace's teammates) with the exact fields returned enumerated. An agent can distinguish this from list_macros, list_products, list_topics without opening any schema.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

Gives concrete downstream usage: 'Use a teammate id as update_conversation's assigneeId and a team id as its teamId.' This is a clear cross-tool linkage. It doesn't state when *not* to use this tool or any prerequisites, which is why it falls short of a 5.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.